JPH0733343Y2 - relay - Google Patents

Description

[Detailed description of the device]

[0001]

TECHNICAL FIELD The present invention relates to a structure of a relay and a specific structure of a movable iron piece loaded therein.

[0002]

2. Description of the Related Art FIGS. 1 to 5 show the structure of the present invention, but the main idea of the present invention is the concrete structure shown in FIGS. Since it is of a well-known type and is not directly related to the gist of the present invention, the general structure of this type of relay will be described with reference to FIG. 1 and FIG. A side view and FIG. 2 are plan views, and in each figure, 1
Is an insulating base that electrically cuts off a casing, which is an object to be fixed (not shown), 2 is a relay yoke fixed to the insulating base 1, 3
Is a coil fixed to the yoke 2, in which the iron core 5
Equipped with. Reference numeral 4 denotes a bracket having an upper portion connected to the upper portion of the yoke 2 bent inward in an L-shape, and having a common terminal 6. Reference numeral 7 denotes a movable iron piece. A conventional type is described later with reference to FIG. .. 8 is a movable contact base metal, and a screw 9 having a shunt wire from the common terminal 6 connected to one end thereof,
The other end is provided with movable contacts 10 and 10 'on the upper surface and the lower surface, respectively. Reference numeral 13 is a pin fixed to the center of the upper surface of the movable contact base metal 8, into which a lower cap 12 and an upper cap 11 are inserted, and 15 is a contact spring loaded between the caps. Reference numeral 14 is a return spring, 16 is a fixed terminal of the movable contact 10 ', 17 is a fixed terminal of the fixed contact 18, and 19 is a shunt wire.

[0003]

2. Description of the Related Art Regarding the operating condition of a relay constructed as described above, although it is in the illustrated state before energization, when the coil 3 is energized, first, the movable iron piece 7 is attached to the iron core 5. The movable contact base 8 descends following the suction of the electric field, the movable contact 10 contacts the fixed contact 18, and the potential of the common terminal 6 is transmitted to the shunt wire 19, the movable contact base 8, and the fixed terminal 17. However, the movable contact 10 of the movable contact base metal 8 and the fixed terminal 1
When the fixed contact 18 of 7 contacts, the most important thing is to keep both contacts 10 and 18 in the same plane position, that is, to prevent the displacement of both contacts 10 and 18 from occurring. For that reason, in the past,
The following movable iron pieces were used. 6 to 8 show an example of a conventional type, and FIGS. 9 to 11 show similarly different examples. In each of these figures, FIGS. 6 and 9 are plan views.
7 and 10 are front views and FIGS. 8 and 11 are right side views. In each of the drawings, the same parts are designated by the same reference numerals, and the specific structure will be described in detail. In FIG. 8, 7 is a movable iron piece made of a plate-like body having a substantially rectangular shape, and 20 and 21 are both ends of a portion projecting to the upper end surface of the movable iron piece 7 in front (in the surface direction of the drawing) of the surface of the iron piece 7. The guide protrusions are bent at right angles to each other, and the movable contact base metal 8 is placed in the guide protrusions so that both sides of the base metal 8 are held, and the base metal 8 moves up and down when the relay operates. The movable contact 10 of the base metal 8 is caused to act on the fixed contact 18 of the fixed terminal 17 so as to keep the same contact with each other by eliminating the positional deviation due to the horizontal movement. However, as mentioned above, the guide protrusion 2
Since 0 and 21 are obtained by simply bending both upper ends of the movable iron piece 7, an action of moving left and right when the movable contact base 8 is violently moved up and down is added.
There is a drawback in that a bending stress is applied to the bent portions, so that each bent portion is easily broken. Therefore, in order to solve such a defect, as shown in FIGS. 9 to 11, the bending direction of the guide protrusions 20 and 21 is bent at right angles to the longitudinal direction of the movable iron piece 7, and the loaded movable contact is provided. The protrusions are orthogonal to each other on both side surfaces in the longitudinal direction of the base metal 8, that is, the guide protrusions 2
There is one modified so that it can be held at the opposite end faces of 0 and 21. However, even with such a configuration, although the breakage of the bent portion is eliminated for the time being, as a result of the opposite side surfaces of the guide projections 20 and 21 contacting both side surfaces of the movable contact base metal 8,
That is, each end face with a small contact area (the thickness of the movable iron piece 7)
However, since the movable contact piece 8 is in contact with both side surfaces of the movable contact base metal 8 to be loaded, the movable iron piece 7 is made of iron, and the movable contact base metal 8 is added.
Since the base metal 8 is made of a copper alloy, the base metal 8 made of a soft material is worn away, and it is still insufficient to completely contact the original intended contacts 10 and 18 at the same position. , This has a drawback.

[0004]

[Purpose of the Proposal] The present proposition is intended to eliminate the drawbacks of the movable member as much as possible, and the purpose thereof is to move the movable iron piece 7 that continuously repeats severe contact on both sides of the movable contact base metal 8. The contact areas of the guide projections 22 and 23 that are raised up are made large, and the end areas of the projections themselves are increased by providing two upright portions of each of the guide projections 22 and 23 to give elasticity. The wear of the contact portion of the movable contact base metal 8 and the breakage of the respective rising portions are both reduced to give durability for long-term use.

[0005]

[Main point of this plan] In this plan, two right and left guide projections 22 and 23 which oppose each other are formed in the vicinity of the upper end of a movable iron piece 7 formed of a plate-like body to be loaded into a relay, from the back surface thereof toward the front surface. It is characterized in that each base portion of each protrusion is formed so as to open toward the opposing surface so as to have an inverted V shape.

[0006]

[Embodiment of the Present Invention] FIGS. 3 to 5 show an embodiment of a movable iron piece applied to the relay of the present invention. FIG. 3 is a plan view, FIG. 4 is a front view, and FIG. 5 is a right side view. In the figure, 7 is a movable iron piece made of a plate-like member, 22 and 23 are left and right protrusions formed in a mountain shape near the upper surface of the movable iron piece 7 from the rear surface of the iron piece 7 toward the front surface as shown in FIG. With the two guide protrusions, the respective base portions of the guide protrusions 22 and 23 are formed so as to open in a V shape toward the opposing surface as shown in FIG. Reference numeral 24 denotes a recess for contacting the head of a screw 9 for fixing the shunt wire 19 to one end of the movable contact base metal 8 to form a fulcrum of the base metal 8, and as shown in FIGS. Opposite to each of the guide protrusions 22 and 23, it is formed so as to project on the back surface of the movable iron piece 7. Reference numerals 25 and 26 are kerfs that engage with the bracket 4.

[0007]

[Effects of the Present Invention] According to the present invention, since the relay is loaded with the movable iron piece 7 having the specific structure shown in FIGS. 3 to 5, that is, as shown in FIG. Since the guide projections 22 and 23 formed near the upper end of the movable iron piece 7 are formed in a mountain-shaped projecting shape, a large area can be secured for the portions contacting both sides of the movable contact base 8 in the longitudinal direction. Since the bases of the guide protrusions 22 and 23 protruding from 7 are formed to open in a V shape and oppose each other, sufficient mechanical strength to withstand impact at the time of contact is maintained, and the contact Since the impact itself can be elastically absorbed and relaxed together with the increase of the area, the movable contact metal base 8 made of a soft material as found in the conventional type can be used.
It is possible to prevent the occurrence of abrasion damage caused by contact with both sides of the guide as much as possible, and since it has elasticity, it is possible to avoid breakage due to a severe impact received on the guide projections 22 and 23 itself, and thus stable for long-term use. It can withstand and has an excellent effect. In the above description, as the relay of the present invention, the three-pole type of the configuration in which the common terminal 6 is switched to the two fixed terminals 16 and 17 has been described, but the relay is not limited to this and the fixed terminal 16 is not limited thereto. It can of course be applied to a two-pole type relay that omits the above without any problem.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention relay.

FIG. 2 is a plan view of FIG.

FIG. 3 is a plan view of a movable iron piece used for the relay of the present invention.

FIG. 4 is a front view of FIG.

5 is a right side view of FIG.

FIG. 6 is a plan view showing an example of a conventional movable iron piece.

FIG. 7 is a front view of FIG.

FIG. 8 is a right side view of FIG.

FIG. 9 is a plan view showing a different example of a conventional movable iron piece.

FIG. 10 is a front view of FIG.

FIG. 11 is a right side view of FIG.

[Explanation of symbols]

 1 Insulation Stand 2 Yoke 3 Coil 4 Bracket 5 Iron Core 6 Common Terminal 7 Movable Iron Piece 8 Movable Contact Base Metal 9 Screw 10 Movable Contact 10 'Movable Contact 11 Upper Cap 12 Lower Cap 13 Pin 14 Return Spring 15 Contact Spring 16 Fixed Terminal 17 Fixed terminal 18 Fixed contact 19 Shunt wire 20 Guide protrusion 21 Guide protrusion 22 Guide protrusion 23 Guide protrusion 24 Recess 25 Cut groove 26 Cut groove

Claims (1)

[Scope of utility model registration request] 1. A yoke 2 and a coil 3 fixed to the yoke 2.
A bracket 4 fixed to the yoke, a movable iron piece 7 having one end engaged with the bracket and the other end being attracted to the iron core 5 of the coil, and a movable iron piece mounted on the movable iron piece for driving. In the relay of the type including the contact base metal 8, the movable iron piece 7 is made of a plate-shaped body, and two guide projections 22 and 23 that oppose each other from the rear surface to the front surface are formed in the vicinity of the upper end of the movable iron piece 7. A relay formed by projecting in a mold shape so that each base of each of the protrusions has a V-shape and opens toward the facing surface on the surface.